import java.math.BigInteger;
import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while(in.hasNextInt()){
            int n = in.nextInt();
            int pre = 0;
            int prev = 1;
            int cur = 0;
            while(true){
                cur = pre + prev;
                if(cur > n){
                    break;
                }
                pre = prev;
                prev = cur;
            }
            int x = Math.min(Math.abs(cur - n),Math.abs(prev - n));
            System.out.println(x);
        }
    }
}